Spark fun has a few products that you can use as-is (no schematics):
http://www.sparkfun.com/commerce/categories.php?cPath=53_54

Usually I just go to national semiconductor and use their power designer:
http://www.national.com/appinfo/power/webench.html
You put in your input voltage range, output voltage and current, and
it spits out a design.  If it's a generic enough design you can even
order kits from them.

It gives you a good starting point, although all these places (linear,
maxim, etc) will have data sheets with good regulator designs using
their parts.

There have also been other cheap regulator designs posted to the
piclist - do a search.

-Adam

On 5/8/08, Neil Cherry <ncherry@linuxha.com> wrote:
> I've been poking around and I've found a few good links (I can share
> if you ask) but I'm a bit overloaded with information and could use
> a little help.
>
> What I'm looking for is a SMPS for use with batteries (AA). Does
> anyone have any good sites for simple but efficient SMPS? Also
> are there relays that can be activated by 3V?
>
> Thanks
>
> --
> Linux Home Automation         Neil Cherry       ncherry@linuxha.com
> http://www.linuxha.com/                         Main site
> http://linuxha.blogspot.com/                    My HA Blog
> Author of:      Linux Smart Homes For Dummies
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